re PR middle-end/50527 (inconsistent vla align)

2011-10-07  Tom de Vries  <tom@codesourcery.com>

	PR middle-end/50527
	* gcc.dg/pr50527.c: New test.

From-SVN: r179656

gcc/testsuite/ChangeLog

+2011-10-07  Tom de Vries  <tom@codesourcery.com>
+
+	PR middle-end/50527
+	* gcc.dg/pr50527.c: New test.
+
 2011-10-07  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/50650

gcc/testsuite/gcc.dg/pr50527.c

+/* { dg-do run } */
+/* { dg-options "-Os --param large-stack-frame=30" } */
+
+extern void abort (void);
+
+void __attribute__((noinline))
+bar (char *a)
+{
+}
+
+void __attribute__((noinline))
+foo (char *a, int b)
+{
+}
+
+void __attribute__((noinline))
+test_align (char *p, int aligned, unsigned int mask)
+{
+  int p_aligned = ((unsigned long int)p & mask) == 0;
+  if (aligned != p_aligned)
+    abort ();
+}
+
+int
+main ()
+{
+  const int kIterations = 4;
+  char results[kIterations];
+  int i;
+  unsigned int mask;
+
+  mask = 0xf;
+  test_align (results, ((unsigned long int)results & mask) == 0, mask);
+  mask = 0x7;
+  test_align (results, ((unsigned long int)results & mask) == 0, mask);
+  mask = 0x3;
+  test_align (results, ((unsigned long int)results & mask) == 0, mask);
+  mask = 0x1;
+  test_align (results, ((unsigned long int)results & mask) == 0, mask);
+
+  bar (results);
+  for (i = 0; i < kIterations; i++)
+    foo ("%d ", results[i]);
+
+  return 0;
+}